Riot police have clashed with hundreds of protesters on Whitehall as the Black Lives Matter protests over George Floyd's death became heated. Officers in full riot gear and on horseback moved in amid tense scenes outside Downing Street. Thousands of anti-racist activists had gathered outside Downing Street following a rally on Parliament Square and a march through central London on Saturday. A police horse bolted after officers on horseback charged protesters just after 6pm as skirmishes erupted.